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Record #167952:

Polar ocean stratification in a cold climate / Daniel M. Sigman, Samuel L. Jaccard, Gerald H. Haug.

Title: Polar ocean stratification in a cold climate / Daniel M. Sigman, Samuel L. Jaccard, Gerald H. Haug.
Author(s): Sigman, Daniel M.
Jaccard, Samuel L.
Haug, Gerald H.
Date: 2004.
In: Nature. (2004.), Vol. 428(6978) (2004)
Abstract: Presents deep-sea records of biogenic opal accumulation and sedimentary nitrogen isotopic composition from sub-arctic North Pacific Ocean (ODP site 882) and Antarctic Zone of Southern Ocean (ODP site 1096). Infers changes 2.7 million years ago in productivity by diatoms and balance between physical supply and biological assimilation of nitrate. Argues these reflect increased vertical stratification in northern and southern high latitudes, when Northern Hemisphere glaciation intensified in association with global cooling during late Pliocene. Proposes near-freezing dependence of sea-water density on temperature meant cooling increased polar ocean stratification by weakening role of temperature in density structure relative to that of salinity. Examines effect of cooling on today's wintertime Antarctic as example. Argues effect may have amplified global cooling by increasing carbon dioxide trapped in abyss.
Notes:

Nature. Vol. 428(6978) :59-63 (2004).

Keywords: 551.46 -- Oceanography, physical.
551.461.8 -- Palaeo-oceanography.
551.58 -- Climatology.
551.583.7 -- Palaeoclimatology.
551.782.2 -- Pliocene.
54.027 -- Isotope analysis.
546.17 -- Nitrogen.
546.175 -- Nitrates.
546.26 -- Carbon.
546.264-31 -- Carbon dioxide.
551.352/.353 -- Marine sediments, deep sea.
551.46.06 -- Oceanography, observational data.
551.465.4 -- Oceanography, stratification.
551.463.6 -- Sea water, thermal properties and heat flux.
551.465.46 -- Upwelling.
551.338 -- Ice ages, theories of causation.
551.588 -- Climate, effect of man and environment.
574.55 -- Productivity, aquatic ecology.
574.583 -- Plankton.
58 -- Botany.
582.261 -- Diatomaceae.
C -- Oceanography, hydrography and hydrology.
(*7) -- Antarctic regions.
(*80) -- Southern Ocean.
(*66) -- North Pacific Ocean.
SPRI record no.: 167952

MARCXML

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005 20220926212822.0
007 ta
008 220926s2004####xx#ab#|##|###|0||#0|eng#d
035 ## ‡aSPRI-167952
040 ## ‡aUkCU-P‡beng‡eaacr
100 1# ‡aSigman, Daniel M.
245 10 ‡aPolar ocean stratification in a cold climate /‡cDaniel M. Sigman, Samuel L. Jaccard, Gerald H. Haug.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2004.
300 ## ‡ap. 59-63 :‡bdiags., map.
500 ## ‡aNature. Vol. 428(6978) :59-63 (2004).
520 3# ‡aPresents deep-sea records of biogenic opal accumulation and sedimentary nitrogen isotopic composition from sub-arctic North Pacific Ocean (ODP site 882) and Antarctic Zone of Southern Ocean (ODP site 1096). Infers changes 2.7 million years ago in productivity by diatoms and balance between physical supply and biological assimilation of nitrate. Argues these reflect increased vertical stratification in northern and southern high latitudes, when Northern Hemisphere glaciation intensified in association with global cooling during late Pliocene. Proposes near-freezing dependence of sea-water density on temperature meant cooling increased polar ocean stratification by weakening role of temperature in density structure relative to that of salinity. Examines effect of cooling on today's wintertime Antarctic as example. Argues effect may have amplified global cooling by increasing carbon dioxide trapped in abyss.
530 ## ‡aAlso issued online ‡uurn:doi:10.1038/nature02357‡uhttps://dx.doi.org/10.1038/nature02357
650 07 ‡a551.46 -- Oceanography, physical.‡2udc
650 07 ‡a551.461.8 -- Palaeo-oceanography.‡2udc
650 07 ‡a551.58 -- Climatology.‡2udc
650 07 ‡a551.583.7 -- Palaeoclimatology.‡2udc
650 07 ‡a551.782.2 -- Pliocene.‡2udc
650 07 ‡a54.027 -- Isotope analysis.‡2udc
650 07 ‡a546.17 -- Nitrogen.‡2udc
650 07 ‡a546.175 -- Nitrates.‡2udc
650 07 ‡a546.26 -- Carbon.‡2udc
650 07 ‡a546.264-31 -- Carbon dioxide.‡2udc
650 07 ‡a551.352/.353 -- Marine sediments, deep sea.‡2udc
650 07 ‡a551.46.06 -- Oceanography, observational data.‡2udc
650 07 ‡a551.465.4 -- Oceanography, stratification.‡2udc
650 07 ‡a551.463.6 -- Sea water, thermal properties and heat flux.‡2udc
650 07 ‡a551.465.46 -- Upwelling.‡2udc
650 07 ‡a551.338 -- Ice ages, theories of causation.‡2udc
650 07 ‡a551.588 -- Climate, effect of man and environment.‡2udc
650 07 ‡a574.55 -- Productivity, aquatic ecology.‡2udc
650 07 ‡a574.583 -- Plankton.‡2udc
650 07 ‡a58 -- Botany.‡2udc
650 07 ‡a582.261 -- Diatomaceae.‡2udc
650 07 ‡aC -- Oceanography, hydrography and hydrology.‡2local
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
651 #7 ‡a(*80) -- Southern Ocean.‡2udc
651 #7 ‡a(*66) -- North Pacific Ocean.‡2udc
700 1# ‡aJaccard, Samuel L.
700 1# ‡aHaug, Gerald H.
773 0# ‡7nnas ‡tNature. ‡gVol. 428(6978) (2004) ‡wSPRI-1046
917 ## ‡aUnenhanced record from Muscat, imported 2019
948 3# ‡a20220926